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反射镜测角仪是国内学校卫生工作者最常用的的仪器之一。但长期以来仅用于测量教室的投射角与开角。其实该仪器还具有其它多种功能。笔者在研制曾获国家专利的《儿少卫生多功能检测仪》的仪器时,其中就开发了与保护学生视力有关的黑板垂直视角(或仰角)、水平视角(或观察角)及灯光(发光体)眩光效应角等的新用途。现简介如下。1 原理、材料及制作该仪器是应用物体与平面镜上的物象相对称的镜象而制作。制作材料易得、方法简便。即取长10cm、宽3cm、厚0.5cm的有机玻璃(或木板、塑板均可);反射镜长10cm、宽3cm;在镜中背面上划一与镜两端平
Mirror goniometer is one of the most commonly used instruments of domestic school health workers. However, it has long been used only to measure the projection angle and the opening angle of a classroom. In fact, the instrument also has a variety of other functions. In the development of the instrument entitled “Children’s Hygiene Multifunction Detector”, which was awarded the national patent, the author developed a vertical angle (or elevation angle), a horizontal angle (or observation angle) and a light level Body) Glare effect angle of the new use. Now the introduction is as follows. 1 Principle, materials and production The instrument is the application of objects and mirrors on the mirror image of symmetry and production. Easy to produce materials, the method is simple. Take the length of 10cm, width 3cm, 0.5cm thick plexiglass (or wood, plastic panels can be); mirror length 10cm, width 3cm;